Nicotinamide hypoxanthine dinucleotide sodium salt is primarily used in biochemical research and enzymatic studies. It serves as a coenzyme in redox reactions, facilitating the transfer of electrons in metabolic pathways. This compound is particularly valuable in studying the mechanisms of enzymes like dehydrogenases, which play a critical role in cellular respiration and energy production. Additionally, it is employed in the development of assays to measure enzyme activity and to investigate metabolic disorders. Its stability and solubility make it a practical choice for laboratory applications, including the preparation of buffer solutions and the study of cellular metabolism in various biological systems.